I am exploding an array appending it and then I am imploding the array back. Everything works fine but I got a small doubt. Please take the example below.
$x = "123,456,789"
explode (' ', $x);
$x[] = "987";
implode (',', $x);
The output looks like the following :
,123,456,789,987
The problem is that the comma appears before the values. I want them to appear after just like the following
123,456,789,987,
You're exploding on a blank space instead of a comma:
explode (' ', $x);
should be
explode (',', $x);
$x = '123,456,789'; // use ' instead " (just for performance)
$x = explode (',', $x);
$x[] = '987';
$y = implode (',', $x);
echo $y . ','; // add trailing comma (what nickb said)
// output:
123,456,789,987,
About the single vs double quotes issue please refers to PHP strings and Is there a performance benefit single quote vs double quote in php?
Related
I have String in PHP like:
[x,y,z]
and I want to change it to
["x", "y", "z"]
I used str_replace but I can't represent the double quotation mark " in it like this
$modified = str_replace("[", "["", $NodeIDs);
I also used \ before it like java but it appears in the output. how can I do this?
You can use double quotes " inside single quotes ':
$modified = str_replace("[", '["', $NodeIDs);
Or escape them:
$modified = str_replace("[", "[\"", $NodeIDs);
Or this might be a better approach to get the desired result:
$letters = explode(',', trim($NodeIDs, '[]'));
$NodeIDs = '["' . implode('","', $letters) . '"]';
Another option is using trim, explode and json_encode:
$output = json_encode(explode(',', trim('[x,y,z]', "[]")));
print_r($output);
//["x","y","z"]
Ideone Demo
Single quotes should do the trick:
$modified = str_replace("[", '["', $NodeIDs);
Good luck to you on your project!
Simply do this
Use trim for removing the [, ] from the string, then use explode function to get the exploded string and then implode them.
$str = '[x,y,z]';
$arr = explode(",", trim($str, "[]"));
echo $str = '["'.implode('","', $arr).'"]'; //["x","y","z"]
I have a variable that contains comma separated strings and I would like to create a check if this variable has duplicate strings inside without converting it into an array. If it would make it any easier, each comma separated strings have 3 characters.
example.
$str = 'PTR, PTR, SDP, LTP';
logic: if any of the strings has a duplicate value then display an error.
This should work for you:
Just use strtok() to loop through each token of your string, with , as delimiter. Then use preg_match_all() to check if the token is more than once in the string.
<?php
$str = "PTR, PTR, SDP, LTP";
$tok = strtok($str, ", ");
$subStrStart = 0;
while ($tok !== false) {
preg_match_all("/\b" . preg_quote($tok, "/") . "\b/", substr($str, $subStrStart), $m);
if(count($m[0]) >= 2)
echo $tok . " found more than 1 times, exaclty: " . count($m[0]) . "<br>";
$subStrStart += strlen($tok);
$tok = strtok(", ");
}
?>
output:
PTR found more than 1 times, exaclty: 2
You are going to run into some issues with just using explode. In your example, if you use explode, you'll get:
'PTR', ' PTR', ' SDP', ' LTP'
You have to map trim in there.
<?php
// explode on , and remove spaces
$myArray = array_map('trim', explode(',', $str));
// get a count of all the values into a new array
$stringCount = array_count_values($myArray);
// sum of all the $stringCount values should equal size of $stringCount IE: they are all 1
$hasDupes = array_sum($stringCount) != count($stringCount);
?>
This question already has answers here:
PHP: How can I explode a string by commas, but not wheres the commas are within quotes?
(2 answers)
Closed 8 years ago.
I'm trying to figure out how to add double quote between text which separates by a comma.
e.g. I have a string
$string = "starbucks, KFC, McDonalds";
I would like to convert it to
$string = '"starbucks", "KFC", "McDonalds"';
by passing $string to a function. Thanks!
EDIT: For some people who don't get it...
I ran this code
$result = mysql_query('SELECT * FROM test WHERE id= 1');
$result = mysql_fetch_array($result);
echo ' $result['testing']';
This returns the strings I mentioned above...
Firstly, make your string a proper string as what you've supplied isn't. (pointed out by that cutey Fred -ii-).
$string = 'starbucks, KFC, McDonalds';
$parts = explode(', ', $string);
As you can see the explode sets an array $parts with each name option. And the below foreach loops and adds your " around the names.
$d = array();
foreach ($parts as $name) {
$d[] = '"' . $name . '"';
}
$d Returns:
"starbucks", "KFC", "McDonalds"
probably not the quickest way of doing it, but does do as you requested.
As this.lau_ pointed out, its most definitely a duplicate.
And if you want a simple option, go with felipsmartins answer :-)
It should work like a charm:
$parts = split(', ', 'starbucks, KFC, McDonalds');
echo('"' . join('", "', $parts) . '"');
Note: As it has noticed in the comments (thanks, nodeffect), "split" function has been DEPRECATED as of PHP 5.3.0. Use "explode", instead.
Here is the basic function, without any checks (i.e. $arr should be an array in array_map and implode functions, $str should be a string, not an array in explode function):
function get_quoted_string($str) {
// Here you will get an array of words delimited by comma with space
$arr = explode (', ', $str);
// Wrapping each array element with quotes
$arr = array_map(function($x){ return '"'.$x.'"'; }, $arr);
// Returning string delimited by comma with space
return implode(', ', $arr);
}
Came in my mind a really nasty way to do it. explode() on comma, foreach value, value = '"' . $value . '"';, then run implode(), if you need it as a single value.
And you're sure that's not an array? Because that's weird.
But here's a way to do it, I suppose...
$string = "starbucks, KFC, McDonalds";
// Use str_replace to replace each comma with a comma surrounded by double-quotes.
// And then shove a double-quote on the beginning and end
// Remember to escape your double quotes...
$newstring = "\"".str_replace(", ", "\",\"", $string)."\"";
In a comma delimited string, in php, as such: "1,2,3,4,4,4,5" is it possible to say:
if(!/*4 is in string bla*/){
// add it via the .=
}else{
// do something
}
In arrays you can do in_array(); but this isn't a set of arrays and I don't want to have to convert it to an array ....
Try exploding it into an array before searching:
$str = "1,2,3,4,4,4,5";
$exploded = explode(",", $str);
if(in_array($number, $exploded)){
echo 'In array!';
}
You can also replace numbers and modify the array before "sticking it back together" with implode:
$strAgain = implode(",", $exploded);
You could do this with regex:
$re = '/(^|,)' + preg_quote($your_number) + '(,|$)/';
if(preg_match($re, $your_string)) {
// ...
}
But that's not exactly the clearest of code; someone else (or even yourself, months later) who had to maintain the code would probably not appreciate having something that's hard to follow. Having it actually be an array would be clearer and more maintainable:
$values = explode(',', $your_string);
if(in_array((str)$number, $values)) {
// ...
}
If you need to turn the array into a string again, you can always use implode():
$new_string = implode(',', $values);
I've gone through this address:
Passing an array to a query using a WHERE clause
and found that if I use a join clause to separate values , is also at the end of the array. How can I remove last?
I am using like this
$ttst=array();
$ttst=array();
$tt = "SELECT frd_id FROM network WHERE mem_id='$userId'";
$appLdone = execute_query($tt, true, "select");
foreach($appLdone as $kk=>$applist){
$ttst[] = $applist['frd_id'];
}
$result = implode(',', $ttst);
then also coming last ,
Thanks.
but it doesn't give single quote to each value .
join(',', array_filter($galleries))
array_filter gets rid of empty elements that you seem to have. Of course, you should take care not to have empty elements in there in the first place.
You could use trim() (or rtrim()):
$myStr = 'planes,trains,automobiles,';
$myStr = trim($myStr, ',');
$str = "orange,banana,apple,";
$str = rtrim($str,',');
This will result in
$str = "orange,banana,apple";
Update
Based on your situation:
$result = implode(',', $ttst);
$result = rtrim($result,',');
$arr = array(...);
$last = end($arr);
unset($last);
If the trailing "," is an array element of itself, use array_pop(), else, use rtrim()
$array = array('one','two',3,',');
array_pop($array);
print_r($array);
Gives:
Array ( [0] => one 1 => two 2 => 3
)
No need for length. Just take from beginning to the (last character - 1)
$finalResult = $str = substr($result, 0, -1);
Use implode() instead! See Example #1 here http://php.net/manual/en/function.implode.php
Edit:
I think a quick fix would be (broken down in steps):
$temp = rtrim(implode(',', $ttst), ','); //trim last comma caused by last empty value
$temp2 = "'"; //starting quote
$temp2 .= str_replace(",", "','", $temp); //quotes around commas
$temp2 .= "'"; //ending quote
$result = $temp2; // = 'apples','bananas','oranges'
This should give you single-quote around the strings, but note that if some more values in the array are sometimes empty you will probably have to write a foreach loop and build the string.